No, that's not a typo, that's how everyone feels after seeing this. Seems like almost all the new megas are either total crap or obviously broken, with little room for anything in between.
Anyway, Mega Beedrill. Wow. It has a very similar BST to that of Mawile, and virtually none of the assets. No awesome STAB combination, no insane defensive typing, no priority, no Intimidate cheese, barely anything. So Huge Power clearly would've been a more appropriate fix than Adaptability. Sure, we've seen with Mega Lucario how great Adaptability is, but base Lucario is at least somewhat respectable. Not so for Beedrill.
As for Mega Pidgeot... here's to hoping for a big boost to special attack, because virtually the only thing that can be accomplished with No Guard is boosting the accuracy of Hurricane and Heat Wave. Its physical moves already have 100 accuracy anyway (aside from the very questionable Steel Wing), so I'm hoping for it to become more special-based, if only because of that.
Mega Lati@s were also officially revealed, although we already knew everything about them, right down to the ability and stats. One thing I find particularly weird, though, is that they were in X/Y's code, but none of the other new megas were. I wonder why? Anyway, seems like you can also fly around the skies of Hoenn with them, in what appears to be a very similar mechanic to Ranger 3. And just like in Ranger 3, you can find all kinds of Pokémon you couldn't otherwise, including legendaries. And not just any legendaries either, we're talking about the likes of Dialga, Palkia, Reshiram and Zekrom here. So you know how most games before X/Y had a TON of legendaries available for capture? After really cracking down on them in X/Y, looks like that notion is back.
Edit: Basically, all non-event legendaries from gens 2, 4 and 5 will be found with that sky mechanic. That is beyond excessive. Unless, of course, there are version exclusives, or other such restrictions. Of course, this might be either to avoid penalizing those who don't have Bank, to allow every Pokémon short of cover legendaries and events in upcoming VGC formats, or both. Still, maybe they should've kept some for Z/XY2, because holy shit that's a lot of legendaries. Maybe they can have their hidden abilities? The gen 2 and 3 trios as well as Heatran are still missing them, among others.
Edit 2: Mega Pidgeot's main stat boost is to special attack, confirming its purpose as a foolproof Hurricane/Heat Wave user. This is good, because despite the number of Normal/Flying Pokémon none of them fill a niche as special attacker without absolutely sucking at it. Unfortunately its best special Normal move is Swift, which means Return and Quick Attack are likely going to be the best choices. Or Hyper Beam... just kidding. That is, unless Hurricane and Heat Wave are good enough that Normal is unneeded. As for Beedrill, it gets big boosts to attack and speed. So despite the good ability when an exceptional one was required, at least they're not screwing it up too hard.